U.S. patent number 10,642,084 [Application Number 15/571,924] was granted by the patent office on 2020-05-05 for virtual curved surface display panel and display device.
This patent grant is currently assigned to BOE TECHNOLOGY GROUP CO., LTD.. The grantee listed for this patent is BOE TECHNOLOGY GROUP CO., LTD.. Invention is credited to Xiaochuan Chen, Jian Gao, Jifeng Tan, Can Wang, Qian Wang, Wei Wang, Yafeng Yang, Can Zhang.
![](/patent/grant/10642084/US10642084-20200505-D00000.png)
![](/patent/grant/10642084/US10642084-20200505-D00001.png)
![](/patent/grant/10642084/US10642084-20200505-D00002.png)
![](/patent/grant/10642084/US10642084-20200505-D00003.png)
![](/patent/grant/10642084/US10642084-20200505-M00001.png)
![](/patent/grant/10642084/US10642084-20200505-M00002.png)
![](/patent/grant/10642084/US10642084-20200505-M00003.png)
![](/patent/grant/10642084/US10642084-20200505-M00004.png)
![](/patent/grant/10642084/US10642084-20200505-M00005.png)
United States Patent |
10,642,084 |
Tan , et al. |
May 5, 2020 |
Virtual curved surface display panel and display device
Abstract
A virtual curved surface display panel and a display device are
provided. By using the imaging principle of the concave lens, the
concave lens array is provided on the display surface of the flat
display panel, and the focal lengths of the concave lenses are
designed to be symmetrically distributed with respect to a vertical
symmetry axis of the display surface. In the concave lenses on the
same side of the symmetry axis, the focal lengths of the respective
concave lenses having the same distance from the vertical symmetry
axis are the same, and the focal lengths of the respective concave
lenses having different distances from the vertical symmetry axis
are different from each other. By setting the focal lengths of the
concave lenses, the image distances of the pixels in the flat
display panel are different so that the images of the plurality of
pixels constitute a curved surface.
Inventors: |
Tan; Jifeng (Beijing,
CN), Gao; Jian (Beijing, CN), Yang;
Yafeng (Beijing, CN), Chen; Xiaochuan (Beijing,
CN), Wang; Wei (Beijing, CN), Wang; Can
(Beijing, CN), Zhang; Can (Beijing, CN),
Wang; Qian (Beijing, CN) |
Applicant: |
Name |
City |
State |
Country |
Type |
BOE TECHNOLOGY GROUP CO., LTD. |
Beijing |
N/A |
CN |
|
|
Assignee: |
BOE TECHNOLOGY GROUP CO., LTD.
(Beijing, CN)
|
Family
ID: |
56729374 |
Appl.
No.: |
15/571,924 |
Filed: |
May 17, 2017 |
PCT
Filed: |
May 17, 2017 |
PCT No.: |
PCT/CN2017/084696 |
371(c)(1),(2),(4) Date: |
November 06, 2017 |
PCT
Pub. No.: |
WO2017/215397 |
PCT
Pub. Date: |
December 21, 2017 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20180231812 A1 |
Aug 16, 2018 |
|
Foreign Application Priority Data
|
|
|
|
|
Jun 15, 2016 [CN] |
|
|
2016 1 0425514 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02F
1/133526 (20130101); G09F 9/35 (20130101); G02B
3/0056 (20130101); G02F 1/1335 (20130101); G02B
27/0983 (20130101); G02B 30/27 (20200101); G02B
19/0014 (20130101); G02B 19/0047 (20130101) |
Current International
Class: |
G03B
21/60 (20140101); G02F 1/1335 (20060101); G02B
27/09 (20060101); G09F 9/35 (20060101) |
Field of
Search: |
;359/454 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
104464523 |
|
Mar 2015 |
|
CN |
|
105390066 |
|
Mar 2016 |
|
CN |
|
105390066 |
|
Mar 2016 |
|
CN |
|
105589277 |
|
May 2016 |
|
CN |
|
105607381 |
|
May 2016 |
|
CN |
|
105629622 |
|
Jun 2016 |
|
CN |
|
105894970 |
|
Aug 2016 |
|
CN |
|
106054289 |
|
Oct 2016 |
|
CN |
|
205670419 |
|
Nov 2016 |
|
CN |
|
2002277903 |
|
Sep 2002 |
|
JP |
|
2011232387 |
|
Nov 2011 |
|
JP |
|
2014086245 |
|
May 2014 |
|
JP |
|
Other References
First Office Action for Chinese Patent Application No.
201610425514.0 dated May 3, 2018. cited by applicant .
Search Report for International Patent Application No.
PCT/CN2017/084696 dated Aug. 3, 2017. cited by applicant.
|
Primary Examiner: Alexander; William R
Assistant Examiner: Washington; Tamara Y.
Attorney, Agent or Firm: Calfee, Halter & Griswold
LLP
Claims
What is claimed is:
1. A virtual curved surface display panel, comprising: a flat
display panel having a plurality of pixels arranged in an array,
and a concave lens array arranged on a display surface of the flat
display panel for making images of the plurality of pixels form a
curved surface; wherein the concave lens array comprises a
plurality of concave lenses arranged in an array; focal lengths of
the plurality of concave lenses are symmetrically distributed with
respect to a vertical symmetry axis of a display surface of the
flat display panel; in the concave lenses on the same side of the
symmetry axis, the focal lengths of the respective concave lenses
having the same distance from the vertical symmetry axis are the
same, and the focal lengths of the respective concave lenses having
different distances from the vertical symmetry axis are different
from each other.
2. The virtual curved surface display panel according to claim 1,
wherein the curved surface is a curved surface protruding toward
the flat display panel.
3. The virtual curved surface display panel according to claim 2,
wherein a focal length of each concave lens gradually decreases as
a distance between the concave lens and the vertical symmetry axis
increases.
4. The virtual curved surface display panel according to claim 3,
wherein at least one pixel in the flat display panel corresponds to
a concave lens in the concave lens array.
5. The virtual curved surface display panel according to claim 3,
wherein a sub-pixel in the flat display panel corresponds to at
least one concave lens in the concave lens array.
6. The virtual curved surface display panel according to claim 5,
wherein a sub-pixel in the flat display panel corresponds to a
plurality of concave lenses with the same focal length in the
concave lens array.
7. The virtual curved surface display panel according to claim 1,
wherein the plurality of concave lenses are biconcave lenses or
liquid crystal lenses.
8. The virtual curved surface display panel according to claim 1,
wherein the plurality of concave lenses are plano concave
lenses.
9. The virtual curved surface display panel according to claim 8,
wherein a concave surface of the plano concave lens is arranged on
a side of the plano concave lens departing away from a display
surface of the flat display panel.
10. The virtual curved surface display panel according to claim 8,
wherein the plurality of concave lenses are cylindrical concave
lenses.
11. The virtual curved surface display panel according to claim 8,
wherein the plurality of concave lenses are spherical concave
lenses.
12. The virtual curved surface display panel according to claim 11,
wherein the spherical concave lenses have the same aperture.
13. The virtual curved surface display panel according to claim 1,
wherein the flat display panel is any one of a liquid crystal
display panel, an electroluminescent display panel, a plasma
display panel, or an electronic paper.
14. The virtual curved surface display panel according to claim 8,
wherein a concave surface of the plano concave lens is arranged on
a side of the plano concave lens facing a display surface of the
flat display panel.
15. A display device comprising a virtual curved surface display
panel; the virtual curved surface display panel comprises: a flat
display panel having a plurality of pixels arranged in an array,
and a concave lens array arranged on a display surface of the flat
display panel for making images of the plurality of pixels form a
curved surface; wherein the concave lens array comprises a
plurality of concave lenses arranged in an array; focal lengths of
the plurality of concave lenses are symmetrically distributed with
respect to a vertical symmetry axis of a display surface of the
flat display panel; in the concave lenses on the same side of the
symmetry axis, the focal lengths of the respective concave lenses
having the same distance from the vertical symmetry axis are the
same, and the focal lengths of the respective concave lenses having
different distances from the vertical symmetry axis are different
from each other.
16. The display device according to claim 15, wherein the curved
surface is a curved surface protruding toward the flat display
panel.
17. The display device according to claim 16, wherein a focal
length of each concave lens gradually decreases as a distance
between the concave lens and the vertical symmetry axis
increases.
18. The display device according to claim 17, wherein at least one
pixel in the flat display panel corresponds to a concave lens in
the concave lens array.
19. The display device according to claim 17, wherein a sub-pixel
in the flat display panel corresponds to at least one concave lens
in the concave lens array.
20. The display device according to claim 19, wherein a sub-pixel
in the flat display panel corresponds to a plurality of concave
lenses with the same focal length in the concave lens array.
Description
RELATED APPLICATIONS
The present application is the U.S. national phase entry of the
international application PCT/CN2017/084696, with an international
filing date of May 17, 2017, which claims the benefit of Chinese
Patent Application No. 201610425514.0, filed on Jun. 15, 2016, the
entire disclosures of which are incorporated herein by
reference.
TECHNICAL FIELD
The present invention relates to the field of display technology,
and particularly to a virtual curved surface display panel and a
display device.
BACKGROUND
Curved surface display can meet people's visual experience well. By
applying curved surface display, the user can be provided with
comfortable visual experience, realistic sense of immediacy, and
good immersion effect.
SUMMARY
The embodiments of the present invention provide a virtual curved
surface display panel and a display device.
An embodiment of the invention provides a virtual curved surface
display panel. The virtual curved surface display panel comprises:
a flat display panel having a plurality of pixels arranged in an
array, and a concave lens array arranged on a display surface of
the flat display panel for making images of the plurality of pixels
form a curved surface. The concave lens array comprises a plurality
of concave lenses arranged in an array. The focal lengths of the
plurality of concave lenses are symmetrically distributed with
respect to a vertical symmetry axis of a display surface of the
flat display panel. In the concave lenses on the same side of the
symmetry axis, the focal lengths of the respective concave lenses
having the same distance from the vertical symmetry axis are the
same, and the focal lengths of the respective concave lenses having
different distances from the vertical symmetry axis are different
from each other.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, the curved surface is a
curved surface protruding toward the flat display panel.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, a focal length of each
concave lens gradually decreases as a distance between the concave
lens and the vertical symmetry axis increases.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, at least one pixel in the
flat display panel corresponds to a concave lens in the concave
lens array.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, a sub-pixel in the flat
display panel corresponds to at least one concave lens in the
concave lens array.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, a sub-pixel in the flat
display panel corresponds to a plurality of concave lenses with the
same focal length in the concave lens array.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, the plurality of concave
lenses are biconcave lenses or liquid crystal lenses.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, the plurality of concave
lenses are plano concave lenses.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, a concave surface of the
plano concave lens is arranged on a side of the plano concave lens
departing away from a display surface of the flat display panel,
alternatively, a concave surface of the plano concave lens is
arranged on a side of the plano concave lens facing a display
surface of the flat display panel.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, the plurality of concave
lenses are cylindrical concave lenses.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, the plurality of concave
lenses are spherical concave lenses.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, the spherical concave
lenses have the same aperture.
Optionally, in the virtual curved surface display panel provided by
the embodiment of the present invention, the flat display panel is
any one of a liquid crystal display panel, an electroluminescent
display panel, a plasma display panel, or an electronic paper.
An embodiment of the invention further provides a display device
comprising the virtual curved surface display panel provided by the
above described embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
The following drawings are merely examples for illustrative
purposes according to various disclosed embodiments and are not
intended to limit the scope of the present disclosure.
FIGS. 1a-1c are respectively structural schematic diagrams of
virtual curved surface display panels according to embodiments of
the invention;
FIG. 2 is a schematic diagram showing the display principle of the
concave lens;
FIG. 3 is a structural schematic diagram of a virtual curved
surface display panel according to an embodiment of the
invention;
FIG. 4 is a structural schematic diagram of a virtual curved
surface display panel according to an embodiment of the invention,
in which liquid crystal lenses are used for realizing concave
lenses;
FIG. 5 is a structural schematic diagram of a virtual curved
surface display panel according to an embodiment of the invention,
in which a liquid crystal display panel is used as a flat display
panel; and
FIG. 6 is a structural schematic diagram of a virtual curved
surface display panel according to an embodiment of the invention,
in which an electroluminescent display panel is used as a flat
display panel.
DETAILED DESCRIPTION OF THE INVENTION
In the following, with reference to the accompanying drawings, the
implementation of the virtual curved surface display panel and the
display device provided by the embodiment of the present invention
will be described in detail.
The shape and size of the components in the drawings do not reflect
the true proportions of the virtual curved surface display panel,
the purpose of which is merely illustrative of the present
invention.
In the prior art, in order to realize curved surface display, a
curved surface display panel is usually formed by performing a
physical mechanical bending process to a flat display panel.
However, this method for realizing curved surface display may cause
problems such as light leakage and abnormal color display on the
display panel due to deformation of the edge portion.
In addition, in order to achieve curved surface display, in the
prior art, many modules within the display panel should be designed
with flexibility. Therefore, the product yield is low, and the cost
of the product is relatively high accordingly.
An embodiment of the invention provides a virtual curved surface
display panel. As shown in FIG. 1a and FIG. 1b, the virtual curved
surface display panel comprises: a flat display panel 100 having a
plurality of pixels arranged in an array, and a concave lens array
200 arranged on a display surface of the flat display panel 100 for
making images of the plurality of pixels form a curved surface. The
concave lens array 200 comprises a plurality of concave lenses 210
arranged in an array. The focal lengths of the plurality of concave
lenses 210 are symmetrically distributed with respect to a vertical
symmetry axis of a display surface of the flat display panel. In
the concave lenses 210 on the same side of the symmetry axis, the
focal lengths of the respective concave lenses 210 having the same
distance from the vertical symmetry axis are the same, and the
focal lengths of the respective concave lenses 210 having different
distances from the vertical symmetry axis are different from each
other. The vertical symmetry axis refers to a symmetry axis in the
vertical direction and parallel to the display surface (indicated
by the sign .circle-w/dot. in FIG. 1a and perpendicular to the
paper). The symmetry axis divides the display surface into two
symmetrical regions. For example, in FIG. 1a and FIG. 1b, the
position of the concave lens 210 with the focal length f0 is the
position of the symmetry axis.
In the virtual curved surface display panel and display device
provided by the embodiments of the present invention, by using the
imaging principle of the concave lens 210 and setting the focal
lengths of the concave lenses 210, the image distances of the
pixels in the flat display panel 100 are different so that the
images of the plurality of pixels constitute a curved surface. A
visual effect of virtual curved surface can thus be realized by
applying a flat display panel, thereby enhancing the visual impact
effect.
Specifically, the imaging principle of concave lens is shown in
FIG. 2. The object AB is imaged as an erected virtual image A'B'.
The object AB and the image A'B' are on the same side of the
concave lens. Therefore, the imaging principle of concave lens is
applied for realizing a display effect of a front virtual surface
with respect to the flat display panel 100.
The basic formulas of the optical system are given below.
Object-image relationship:
##EQU00001##
Focal length of plano concave lens:
##EQU00002##
Focal length of biconcave lens:
.times..times. ##EQU00003##
Arch height of plano concave lens:
##EQU00004##
Paraxial magnification:
.tau. ##EQU00005##
In the above basic formulas of the optical system, a represents the
object distance, b represents the image distance, f represents the
focal length of the concave lens, r represents the curvature radius
of the concave lens, n represents the refractive index of the
concave lens, h represents the arch height of the concave lens, d
represents the thickness of the thinnest portion of the concave
lens, and p represents the aperture of the concave lens (i.e., the
diameter of the cross section of the concave lens).
In an implementation, in the virtual curved surface display panel
provided by the embodiment of the present invention, as shown in
FIG. 1a and FIG. 1b, the curved surface formed by the concave lens
array 200 is a curved surface protruding toward the flat display
panel 100.
From the above basic formulas of the optical system, it can be seen
that when the object distance a is constant, the concave lenses
with different focal lengths f can correspond to different image
distances b. Based on this property, the focal lengths f of the
concave lenses 210 in the concave lens array 200 can be set as
shown in FIGS. 1a and 1b: the focal length f of each concave lens
210 decreases in accordance with the increase of the distance
between the concave lens 210 and the symmetry axis. That is, in
FIG. 1a and FIG. 1b, the concave lens 210 having the focal length
f0 is located on the symmetry axis, f0<f1<f2<f3. In this
way, the concave lens array 200 provides a front virtual image, and
the images are arranged on a curved surface, thereby realizing a
display effect of a front virtual surface with respect to the flat
display panel 100.
In an implementation, in the virtual curved surface display panel
provided by the embodiment of the present invention, two modes can
be applied for setting the relationship between the concave lenses
210 in the concave lens array 200 and the pixels in the flat
display panel 100. In the first mode, at least one pixel RGB in the
flat display panel 100 corresponds to a concave lens 210 in the
concave lens array 200. As shown in FIG. 1a, a concave lens 210 can
correspond to one pixel RGB (indicated with the reference sign
110). A concave lens 210 can also correspond to a plurality of
pixels RGB. In the second mode, a sub-pixel R, G or B in the flat
display panel 100 corresponds to at least one concave lens 210 in
the concave lens array 200. As shown in FIG. 1b, one concave lens
210 corresponds to one sub-pixel R, G or B. Alternatively, as shown
in FIG. 1c, a plurality of concave lenses 210 correspond to one
sub-pixel R, G or B, and the focal lengths of the respective
concave lenses corresponding to this sub-pixel are the same. In an
implementation, a desired virtual display effect can be obtained by
applying a mode in which one sub-pixel R, G or B corresponds to
three concave lenses 210.
In an implementation, in the virtual curved surface display panel
provided by the embodiment of the present invention, the concave
lens 210 in the concave lens array 200 can be a biconcave lens
(i.e., a lens having two concave surfaces, as shown in FIGS. 1a and
1b) or a plano concave lens (i.e., a lens having a flat surface and
a concave surface, as shown in FIG. 3) having a fixed focal length,
the concave lens 210 can also be a liquid crystal lens with an
adjustable focal length. As shown in FIG. 4, the liquid crystal
lens generally includes: an upper substrate 201 and a lower
substrate 202 arranged oppositely, and a liquid crystal layer 203
arranged between the upper substrate 201 and the lower substrate
202. A first electrode 204 is provided on a side of the upper
substrate 201 facing the liquid crystal layer 203, and a second
electrode 205 is provided on a side of the lower substrate 202
facing the liquid crystal layer 203. By controlling the voltage
applied between the first electrode 204 and the second electrode
205, deflection of the corresponding liquid crystal in the liquid
crystal layer 203 can be controlled, thereby providing an optical
effect of a concave lens with a desired focal length.
When the concave lens array 200 is composed of biconcave lenses,
the effect of aberration such as spherical aberration and
distortion is smaller than that of the plano concave lens, so that
it has a better display image effect. However, the implementation
process of the biconcave lens realizing curved surface display is
complicated than that of the plano concave lens. Either a biconcave
lens or a plano concave lens can be manufactured with organic
materials such as PMMA and resin, of which the refractive index is
generally controlled at 1.4-1.8. The specific manufacturing process
can apply but is not limited to exposure development, nanoimprint,
laser direct writing or electron beam direct writing and so on.
Further, in the virtual curved surface display panel provided by
the embodiment of the present invention, in order to facilitate the
fabrication of the concave lens array 200, as shown in FIG. 3, a
concave surface of the plano concave lens is arranged on a side of
the plano concave lens departing away from a display surface of the
flat display panel 100. Of course, a concave surface of the plano
concave lens can also be arranged on a side of the plano concave
lens facing a display surface of the flat display panel 100, which
is not limited herein.
Further, in the virtual curved surface display panel provided by
the embodiment of the present invention, the plano concave lens can
be an aspherical concave lens such as a cylindrical concave lens,
or can be a spherical concave lens. In particular, the imaging
effect is better when a spherical concave lens is used.
Further, in the virtual curved surface display panel provided by
the embodiment of the present invention, according to the above
formula (2), it can be understood that different curvature radii r
correspond to different focal lengths f. In order to make the
spherical concave lenses have different focal lengths f, it is
necessary to set the curvature radii of the spherical concave
lenses. Specifically, the arch heights of the spherical concave
lenses are set to a certain value, and the apertures of the
spherical concave lenses can be set to different values, thereby
achieving the effect of adjusting the curvature radii.
Alternatively, the apertures of the spherical concave lenses are
set to a certain value, and the arch heights of the spherical
concave lenses are set to different values, thereby achieving the
effect of adjusting the curvature radii. In an implementation, in
order to facilitate the production, generally the apertures of the
spherical concave lenses are set to be the same, and the curvature
radii can be adjusted by adjusting the arch heights of the
spherical concave lenses.
For example: the size of the pixel is 70 .mu.m, the aperture of the
spherical concave lens is 70 .mu.m, the refractive index of the
spherical concave lens n=1.5, then the above formula can be applied
to calculate the design parameters of the concave lenses
corresponding to different bending states. Taking 1000 pixels as an
example, table 1 and table 2 list the design parameters of the
concave lenses corresponding to these 1000 pixels. The left and
right are symmetrical.
TABLE-US-00001 TABLE 1 serial number object image focal curvature
arch of the distance distance aperture magnification length radius
height pixel a (mm) b (mm) p (mm) .tau. f (mm) r (mm) h (mm) 1 1
0.5000 0.07 0.5000 1.0000 0.5000 0.0012 2 1 0.4995 0.07 0.4995
0.9980 0.4990 0.0012 3 1 0.4985 0.07 0.4985 0.9940 0.4970 0.0012 4
1 0.4970 0.07 0.4970 0.9881 0.4940 0.0012 5 1 0.4950 0.07 0.4950
0.9803 0.4901 0.0013 6 1 0.4925 0.07 0.4925 0.9706 0.4853 0.0013 7
1 0.4896 0.07 0.4896 0.9592 0.4796 0.0013 8 1 0.4862 0.07 0.4862
0.9461 0.4731 0.0013 9 1 0.4823 0.07 0.4823 0.9315 0.4658 0.0013 10
1 0.4779 0.07 0.4779 0.9155 0.4577 0.0013 11 1 0.4732 0.07 0.4732
0.8981 0.4490 0.0014 12 1 0.4679 0.07 0.4679 0.8195 0.4398 0.0014
13 1 0.4623 0.07 0.4623 0.8599 0.4299 0.0014 14 1 0.4563 0.07
0.4563 0.8393 0.4197 0.0015 15 1 0.4499 0.07 0.4499 0.8180 0.4090
0.0015 16 1 0.4432 0.07 0.4432 0.7959 0.3980 0.0015 17 1 0.4361
0.07 0.4361 0.7733 0.3867 0.0016 18 1 0.4287 0.07 0.4287 0.7503
0.3752 0.0016 19 1 0.4210 0.07 0.4210 0.7270 0.3635 0.0017 20 1
0.4130 0.07 0.4130 0.7035 0.3517 0.0017 100 1 0.3721 0.07 0.3721
0.5926 0.2963 0.0021 200 1 0.2980 0.07 0.2980 0.4246 0.2123 0.0029
300 1 0.2089 0.07 0.2089 0.2641 0.1321 0.0047 400 1 0.1256 0.07
0.1256 0.1436 0.0718 0.0091 500 1 0.0629 0.07 0.0629 0.0671 0.0336
0.0236 600 1 0.0252 0.07 0.0252 0.0259 0.0129 -0.0196 700 1 0.0076
0.07 0.0076 0.0077 0.0038 -0.0310 800 1 0.0015 0.07 0.0015 0.0015
0.0008 -0.0342 900 1 0.0002 0.07 0.0002 0.0002 0.0001 -0.0349 1000
1 0.0000 0.07 0.0000 0.0000 0.0000 -0.0350
TABLE-US-00002 TABLE 2 serial number object image focal curvature
arch of the distance distance aperture magnification length radius
height pixel a (mm) b (mm) p (mm) .tau. f (mm) r (mm) h (mm) 1 1
0.9000 0.07 0.9000 9.0000 4.5000 0.0001 2 1 0.8991 0.07 0.8991
8.9108 4.4554 0.0001 3 1 0.8973 0.07 0.8973 8.7373 4.3686 0.0001 4
1 0.8946 0.07 0.8946 8.4886 4.2443 0.0001 5 1 0.8910 0.07 0.8910
8.1770 4.0885 0.0001 6 1 0.8866 0.07 0.8866 7.8165 3.9082 0.0002 7
1 0.8813 0.07 0.8813 7.4215 3.7108 0.0002 8 1 0.8751 0.07 0.8751
7.0056 3.5028 0.0002 9 1 0.8681 0.07 0.8681 6.5808 3.2904 0.0002 10
1 0.8603 0.07 0.8603 6.1569 3.0784 0.0002 11 1 0.8517 0.07 0.8517
5.7418 2.8709 0.0002 12 1 0.8423 0.07 0.8423 5.3413 2.6706 0.0002
13 1 0.8322 0.07 0.8322 4.9593 2.4797 0.0002 14 1 0.8214 0.07
0.8214 4.5984 2.2992 0.0003 15 1 0.8099 0.07 0.8099 4.2598 2.1299
0.0003 16 1 0.7977 0.07 0.7977 3.9439 1.9719 0.0003 17 1 0.7850
0.07 0.7850 3.6504 1.8252 0.0003 18 1 0.7716 0.07 0.7716 3.3787
1.6893 0.0004 19 1 0.7577 0.07 0.7577 3.1277 1.5638 0.0004 20 1
0.7433 0.07 0.7433 2.8961 1.4481 0.0004 100 1 0.6697 0.07 0.6697
2.0280 1.0140 0.0006 200 1 0.5365 0.07 0.5365 1.1573 0.5787 0.0011
300 1 0.3761 0.07 0.3761 0.6027 0.3014 0.0020 400 1 0.2260 0.07
0.2260 0.2920 0.1460 0.0043 500 1 0.1132 0.07 0.1132 0.1277 0.0638
0.0104 600 1 0.0454 0.07 0.0454 0.0476 0.0238 0.0019 700 1 0.0137
0.07 0.0137 0.0139 0.0069 0.0274 800 1 0.0027 0.07 0.0027 0.0028
0.0014 0.0336 900 1 0.0003 0.07 0.0003 0.0003 0.0001 0.0349 1000 1
0.0000 0.07 0.0000 0.0000 0.0000 0.0350
In an implementation, in the virtual curved surface display panel
provided by the embodiment of the present invention, the flat
display panel 100 can be any one of a liquid crystal display panel,
an electroluminescent display panel, a plasma display panel, or an
electronic paper. In FIG. 5, a flat display panel 100 will be
described by taking a liquid crystal display panel as an example.
The liquid crystal display panel includes: an upper substrate 001
and a lower substrate 002 arranged oppositely, a liquid crystal
layer 003 between the upper substrate 001 and the lower substrate
002, an upper polarizer 004 attached over the upper substrate 001,
a lower polarizer 005 attached below the lower substrate 002, and a
backlight module 006 provided below the lower polarizer 005. A side
of the upper polarizer 004 departing away from the liquid crystal
layer serves as a display surface (i.e., light exit surface) of the
liquid crystal display panel. The concave lens array 200 can be
provided over the upper polarizer 004. Light emitted from the
backlight module 006 is modulated by the liquid crystal layer 003
and is emitted from the upper polarizer 004. By means of
diffraction of the concave lenses 210 in the concave lens array 200
having different focal lengths, the light is imaged. In FIG. 6, a
flat display panel 100 will be described by taking an
electroluminescent display panel as an example. The
electroluminescent display panel includes: an anode 008 provided on
a back plate 007, a light emitting layer 009, a cathode electrode
010, and a cover plate 011. For simplicity, the pixels are not
shown in FIGS. 4-6. Those skilled in the art will appreciate that,
similar to the embodiments shown in FIGS. 1a-1c, in the flat
display panels 100 shown in FIGS. 4-6, the plurality of pixels can
be arranged to correspond to a plurality of concave lenses 210
one-to-one.
Based on the same inventive concept, an embodiment of the present
invention also provides a display device including the above
mentioned virtual curved surface display panel. The display device
can be any product or component with display function, such as
mobile phone, tablet computer, TV, display, notebook computer,
digital photo frame, navigator and so on. The implementation of the
display device can refer to the embodiments of the above mentioned
virtual curved surface display panel, which will not be repeated
herein.
In the virtual curved surface display panel and display device
provided by the embodiments of the present invention, by using the
imaging principle of the concave lens, the concave lens array is
provided on the display surface of the flat display panel, and the
focal lengths of the concave lenses are designed to be
symmetrically distributed with respect to a vertical symmetry axis
of the display surface. In the concave lenses on the same side of
the symmetry axis, the focal lengths of the respective concave
lenses having the same distance from the vertical symmetry axis are
the same, and the focal lengths of the respective concave lenses
having different distances from the vertical symmetry axis are
different from each other. By setting the focal lengths of the
concave lenses, the image distances of the pixels in the flat
display panel are different so that the images of the plurality of
pixels constitute a curved surface. A visual effect of virtual
curved surface can thus be realized by applying a flat display
panel, thereby enhancing the visual impact effect.
Apparently, the person skilled in the art may make various
alterations and variations to the invention without departing the
spirit and scope of the invention. As such, provided that these
modifications and variations of the invention pertain to the scope
of the claims of the invention and their equivalents, the invention
is intended to embrace these alterations and variations.
* * * * *